Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Analisa Tebal Lapis Perkerasan Jalan Tgh. Faesal Menggunakan Metode Bina Marga 2017 dan AASHTO 1993
Full text linkRoads have an important role for society, especially in economic growth and industrial development in an area. Based on BPS NTB data in 2023, the length of the Mataram City road is 460 km, where one of the roads in Mataram City, namely TGH.Faesal road, is a connecting road between Mataram City and West Lombok Regency, which can be interpreted as the main road entering Mataram City. so that the condition of the TGH.Faesal road must continue to be analyzed or reviewed regularly so that the condition of the TGH.Faesal road continues to be in good condition. This research uses secondary data obtained from the National Road Planning and Supervision of West Nusa Tenggara Province (P2JN NTB). the methods used are the Bina Marga 2017 and AASHTO 1993 methods. The analysis was carried out to determine the design comparison of each method. The Bina Marga 2017 method obtained the thickness of the actual load pavement layer and normal load, namely the surface layer of 17.5 cm, and the foundation layer of 30 cm. The AASHTO 1993 method obtained the thickness of the pavement layer, namely the surface layer of 18 cm, and the foundation layer of 52 cm
Kebutuhan Dimensi Sumur Resapan untuk Pemukiman Padat di Kelurahan Mandalika Kota Mataram
Full text linkThe rapid development of residential areas in Mataram City has led to significant changes in land use, potentially increasing surface runoff and causing issues such as surface ponding and localized flooding. One feasible solution to mitigate these impacts is the construction of infiltration wells as a form of sustainable and environmentally friendly drainage infrastructure. This study aims to provide technical guidance to the community in one of the densely populated sub-districts of Mataram City for determining the appropriate dimensions of rainwater infiltration wells based on field data. The design rainfall was estimated through frequency analysis using a normal distribution. Rainfall intensity was calculated using the Mononobe method, and runoff discharge was analyzed using the Rational method. Infiltration wells were then designed using the Sunjoto method and applied to residential units in the Mandalika Subdistrict, with variations in building area and land area (LB/LT) ranging from 24/60 to 60/70 square meters. Based on soil testing, the study area has an average soil permeability coefficient of 3.16 cm/hour and an average groundwater table depth of 2.45 meters. The results of the analysis for various house types from small to large, if the well is circular Ø 1.0 meters, then each house needs 1 well with a depth of between 1.14 meters to 1.97 meters, while for a well Ø 0.8 meters, it requires 1 well with a depth (H) between 1.76m to 3.03m. Especially for houses with a roof area of more than 60m2, a well with Ø 0.8 meters requires a depth exceeding the local groundwater level so it is recommended to make 2 or can also use Ø 1.0 meters. The dimensions of the well have been in accordance with the capacity requirements based on rainfall and the position of the local groundwater level
Analisis Kinerja Dome Solar Dryer Untuk Pengeringan Kopi Di Desa Karang Sidemen Kabupaten Lombok Tengah
Full text linkCoffee drying is a crucial stage that influences the final product's quality and flavor. This process must be performed correctly to maintain the quality of the coffee beans and prevent mold growth. This study aims to compare two coffee drying methods, using a Solar Dome Dryer and direct sun drying. The research was conducted in Karang Sidemen Village, Central Lombok, using 100 kg of coffee beans, divided into two groups of 50 kg each for the two drying methods. The results showed that both methods successfully reduced the moisture content to 0%, but the drying with the Solar Dome Dryer was faster (4,320 minutes) compared to direct sun drying (4,380 minutes). The Solar Dome Dryer maintained a more stable temperature (50-60°C) and produced a more consistent drying rate, making it more efficient in preserving the quality of the coffee beans and preventing microbial contamination. This study recommends the use of Solar Dome Dryer for coffee drying in areas with high humidity and variable weather conditions
Rancang Bangun Sistem Pemantauan Suhu dan Kelembaban Udara Berbasis Arduino Uno pada Kumbung Jamur Merang
Full text linkThe environmental conditions of a mushroom house are a crucial factor influencing the growth of straw mushrooms, particularly in terms of temperature and humidity parameters. Therefore, it is essential to continuously monitor the environmental conditions within the mushroom house, specifically temperature and relative humidity (RH). This study aims to design a real-time temperature and humidity monitoring system based on Arduino Uno for use in a straw mushroom house. The research consists of several stages: literature review, design and assembly, programming, testing, and evaluation of testing results using the mean absolute percentage error (MAPE) method. The results show that the developed temperature and humidity monitoring system functions effectively to monitor environmental conditions within the mushroom house. The evaluation of the measurement results using the MAPE method indicates a minimum error rate for temperature and humidity measurements, with a percentage of 2.49% and 9.80%, respectively
Parameter Genetik Beberapa Karakter Kuantitatif Galur S3 Tanaman Jagung di Lahan Kering
Full text linkThis research aims to determine genetic diversity, broad heritability and genotypic correlation of several quantitative characters of the S3 line of corn plants in dry land. Treatment of 30 S3 lines, arranged in a randomized block design, two replications. The characters observed included the variables of flowering, growth, yield components, yield and maturity. The observation data were analyzed using analysis of variance at 5 percent significant level, then genetic variance, phenotypic variance, heritability and genetic diversity coefficient were calculated. Genotypic correlation analysis was also carried out in this study. The results show that ASI and yield have wide genetic diversity; while cobs dry weight per plant is classified as medium and other characteristics are classified as narrow. Heritability in a broad sense is relatively high, obtained at silking time, harvesting time and yield. Eight other characters have moderate heritability and the rest have narrow heritability. A high negative genotypic correlation with leaf angle was obtained for leaf area; while the other four characters have a low negative correlation. Harvesting time had a low positive correlation with flowering variables; other characters are not correlated. Yield was highly positively correlated with plant height; while cob length, cob diameter and cob weight were moderately positively correlated. Plants selected for selfing in the next generation are taller plants, with more leaves and earlier silking time
Hasil Persilangan dan Heterosis Padi Varietas Nasional IPB3S x Varietas Lokal Beak Ganggas
Full text linkThe objective of this study was to determine the success rate of hybridization and the heterosis level in rice resulting from the cross between the national variety IPB3S and the local variety Beak Ganggas. To achieve this goal, the following research activities were conducted: A) Single and reciprocal cross hybridization between IPB3S × Beak Ganggas and Beak Ganggas × IPB3S. B) Evaluation of the F1 generation and its parents using a Randomized Complete Block Design (RCBD) with four treatments and six replications, followed by the calculation of heterosis and heterobeltiosis values. The hybridization was carried out in the greenhouse of the Faculty of Agriculture, University of Mataram, while the evaluation of the hybridization results was conducted in the rice fields of Nyurlembang Village, Narmada District, West Lombok Regency. The research was conducted from February to September 2025. The results showed that the percentage of filled grains from the single cross IPB3S × Beak Ganggas was 68.61%, while the percentage from the reciprocal cross (Beak Ganggas × IPB3S) was 37.28%. Based on heterosis and heterobeltiosis values, the F1 hybrid of IPB3S/Beak Ganggas has strong potential to be developed as a promising ideal-type variety, due to its superior combination of traits such as earlier flowering time, shorter plant height, and higher number of filled grains and grain weight per clump compared to its parent lines
Intervensi Berbasis Kelompok: Sebuah Upaya Peningkatan Literasi Kesehatan Publik Terkait Depresi Maternal
Full text linkBackground Maternal mental health during pregnancy and postpartum is a crucial factor impacting the well-being of both mother and baby. Maternal depression can occur during pregnancy (antenatal depression) or after delivery (postpartum depression). Antenatal depression can affect various aspects of maternal health, including nutritional status, which is a crucial factor in maintaining maternal health and fetal development. Furthermore, approximately 33% of women with postpartum depression have symptom onset during pregnancy, and 27% even before pregnancy. Health promotion through seminars or group-based interventions can significantly improve participants' knowledge levels over a period of time. Considering the importance of health promotion efforts as a preventative measure against maternal depression and the limited research evaluating knowledge retention of pregnant and postpartum mothers after group-based interventions such as health seminars, this study was conducted to assess maternal knowledge retention after two months of seminars on maternal depression. Methods The research design used in this study was a quasi-experimental design. Initial measurements were taken by assessing posttest 1 scores immediately after the seminar and compared with posttest 2 scores measured two months after the seminar. Results The decrease in posttest 2 scores compared to posttest 1 was less than 40% (p-value <0.05), indicating that a two-month period is still ideal for maintaining respondents' knowledge. Factors influencing the study's outcomes included respondents' age, education level, and gestational status. Conclusion Therefore, the seminar method is considered appropriate for increasing public literacy regarding maternal depression
Rancang Bangun dan Uji Eksperimental Performa Burner Biomassa Berbahan Bakar Limbah Nyamplung (Calophyllum Inophyllum) dan Pelet Kayu
Full text linkAs a tropical country, Indonesia has abundant biomass potential because plants grow all year. Among the several types of biomass, nyamplung kernel cake (NKC) has a high potential for use as an energy source. The goal of this research was to develop a biomass burner and evaluate its performance using NKC and wood pellets (WP) as comparisons. The burner performance test is designed to investigate the effect of air mass flow rate on combustion flame, heat release rate, and thermal efficiency for both types of biomass. The thermal efficiency of the burner was calculated using the water boiling test (WBT). The results revealed that using NKC resulted in a longer combustion flame at air flow rates of 146 and 219 g/s. The higher the air flow rate, the longer the flame. The combustion of NKC and WP produced the longest flame, measuring 80 cm with an air mass flow rate of 290 g/s. The experiment also demonstrated that WP produced a higher temperature than NKC. The highest combustion temperature was produced by WP, reaching 818.1°C with an air mass flow rate of 290 g/s. From the two types of biomass evaluated, WP combustion produced more heat than NKC. The highest heat release rate of 35.46 kW was achieved with an air mass flow rate of 290 g/s. The burning of NKC resulted in the maximum thermal efficiency, 30.35% at an air mass flow rate of 219 g/
Perbandingan Gradasi Butiran Sedimen Terendap Waduk Batujai dengan Material Bahan Kerajinan Gerabah Bukit Balibe
Full text linkSediment deposition is the main problem in the continuity of dam operations. Sustainable operation of dam can be maintained by dredging sediment deposited at the bottom of the impounding area. Because of the considerable costs and the lack of economic value of dam deposited sediment, dredging is carried out only when the serious sedimentation problem occurs. This research aims to analyse samples of sediment taken from various depths of Batujai Dam and to compare them with the pottery materials of Balibe Hill. Compositions of deposited sediment were analyzed to determine its potential as an alternative additional material used in pottery making. Comparisons were made based on the results of sieving analysis of material from both sources. The results show that the percentage of fine-grain material of Balibe Hill, especially grains with a diameter of ≤ 0.18 mm, is closer to the percentage of deposited sediment of Batujai Dam at an elevation of 92.5 masl and an elevation of 90.0 masl, while the percentage of coarse-grain material with a diameter of ≥ 3.35 mm is closer to the percentage of deposited sediment at an elevation of 87.5 masl. Gradation analysis indicates that composition of deposited sediment of Batujai Dam in sand grain classes can be engineered to some extent to make them closely identical to the composition of Balibe Hill materials so that it can be used as a mixture in pottery making
Pengaruh Head Terhadap Kecepatan Dan Debit Aliran Irigasi Tetes Bertingkat Berdasarkan Volume Aliran Tertampung
Full text linkThe secondary pipe network in a multi-level drip irrigation network is a water source that will serve the drip irrigation network at each level. The amount of flow obtained by the drip irrigation network is highly dependent on the available head height from the water source. This study aims to determine the amount of flow discharge produced by the height of the water source head in a four-level drip irrigation pipe network, so that it can be used for optimal design of a multi-level drip irrigation network. Optimization of the irrigation network is reviewed against the amount of deviation of discharge from the primary network to the drip discharge, as the final result of irrigation to the plants. The test was carried out on a 4-level drip irrigation network with a water source height from the reservoir of 3.21m with a capacity of 200 liters. The head variation consists of four types according to the amount of height of the drip irrigation network to the surface of the reservoir water. The main data analyzed are the volume of flow collected, discharge, speed and deviation of discharge or speed. While the presentation of the results is displayed in the form of regression graphs between the two test parameters, so that they can be applied generally. In the secondary pipe, there is an average difference in flow velocity of around 0.05 m/s in each network, with the lowest secondary flow rate deviation obtained at a small head of 0.2 cm3/s between the fourth and third floors, while the highest discharge deviation is obtained on the first and second floor networks, which is around 1.6 cm3/s. Low vt deviation is obtained at a head below 2.3m and the highest occurs at a head above 2.3m. The difference in head in the primary and secondary distribution networks does not have a significant effect on the distribution of drip irrigation flow, if the drip points are more numerous, the deviation is still within reasonable limits